An price, quantity or amount that an individual uses or includes in a report or price quote, with little or no thought involved beforehand. Derived from the older proverb, "pulling a <something> out of your ass". More commonly used as an abbreviation.
Engineer #1: "Hey, we need a price quickly on the gazebo to finish the estimate, give me an ass-pulled number (APN)! "
Engineer #2: "Yeah, use $20,000..."
Numbers made up for a particular example that have no meaning beyond being placeholders for the given example. That is, numbers which have been pulled "out of your ass".
"This example shows how the cachelines are organized, but all these addresses are assnumbers."
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.